87979983 has 16 divisors (see below), whose sum is σ = 144377856. Its totient is φ = 46406880.

The previous prime is 87979949. The next prime is 87979987. The reversal of 87979983 is 38997978.

It is a happy number.

It is not a de Polignac number, because 87979983 - 2⁶ = 87979919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87979987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160863 + ... + 161408.

It is an arithmetic number, because the mean of its divisors is an integer number (9023616).

Almost surely, 2^87979983 is an apocalyptic number.

87979983 is a deficient number, since it is larger than the sum of its proper divisors (56397873).

87979983 is a wasteful number, since it uses less digits than its factorization.

87979983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322294.

The product of its digits is 6858432, while the sum is 60.

The square root of 87979983 is about 9379.7645492837. The cubic root of 87979983 is about 444.7622902462.

The spelling of 87979983 in words is "eighty-seven million, nine hundred seventy-nine thousand, nine hundred eighty-three".